1ST LESSON SOLUTION OF IT TOOL BOOK

 

 

1.   What is computer?  what is the advantage and disadvantage of computer?

Computer is a digital electronic device,  which processed data which given by user process it and gave a meaningful data as output. It’s work on GIGO (which means garbage in garbage out).

Advantage of computer

There are some major advantage of computer.

Speed
गति –it can perform million of operation in few second.

Accuracy शुद्धता

 – it ensure that perform solution in a way with.

Diligence
लगन- it can perform same task  

Storage भंडारण

-  it has lot of space for store data.

Automation स्वचालन

 – it complete own task automaticly according instruction.s

Coast effectiveness- it has

Versatility- बहुमुखी प्रतिभा

Disadvantage of Computer

Lack of common sense: 

A computer cannot think for itself. It has no self intelligence.

Memory without brain:

Computer store many data whatever right or wrong because he has no brain.

Slavery :

A computer is slave of users, because without user instruction he can  not do any operation.

2.    What are the main component of pc? Explain it?

There are some main major component of pc.

CPU- this is the brain of computer which control all internal operation of pc.

Monitor- it show data visually according user instruction as output.

Mouse- this is the pointing device which control curser on the display.

Keyboard- it has many keys like-numrical keys, alphabet keys, function keys, arrow keys  and special keys which enter the letters and symbols as input.

Motherboard- this is the main part of CPU which contain all major component.

 

 

3.   What is the role of input and output device in computer system?

Input and output device contain main role in computer system, because without input and output device computer cannot do work.

Through Input device computer get instruction for processing and through  output device computer gave meaning ful information for users.

 

4.   Name some of the input and output devices used with computers.

There are some input and output devices name which used with computer.

Input device	Output device
Mouse	Moniter
Keyboard	Printer
Scanner	Projector
Light pen	Speaker
Joystick	Headphone

 

5.   What are the five basic operations performed by any computer system? Explain each one of them?

A computer has four basic operation which is :-

1.     Input- through this operation pc get data for processing which is given by user.

2.     Processing  - through this operation computer process data according input instruction.

3.     Output – through this operation computer gave information for user.

4.     Storage – through this operation pc store data according user instruction.

 

6.   How many types of memory does a  computer have? Justify the need for each type?

Computer have mainly two types of memory.

1.   Primary memory :

Primary memory is a segment of computer memory that can be accessed directly by the processor.

2.   Secondary memory

Secondary memory is the external memory of pc which  stores data and programs.

 

It holds the data and instructions that the Central Processing Unit (CPU) needs. Before a program can run, the program is loaded from storage into the memory. This allows the CPU direct access to the computer program. Memory is needed in all computers.

 

 

7.    List different types of memory in the computer system. Explain their uses.

1.               Primary memory

a.     Ram- random access memory is the temporary/volatile memory,which holds data in on mode of pc, when pc off he lost all data.  

b.     Rom- read only memory  is the permanent/non-volatile storage memory.

2.               Secondary memory

a.     HD- hard disk has large storage capacity.

b.     Pen drive- it is the USB drive which have

c.      CD – compact disk has 700mb data storage capacity for store any data

d.     DVD –digital video/ versatile disk

e.     SD card

8.   Explain the function of complier, interpreter and assembler.

·       Assembler

It convert assembly language into machine language

·       Compiler

It convert complete package of high level language into machine language.

·       Interpreter

It convert high level language line by line into machine language.

 

9.   Differentiate between hardware and software.

Hardware is the physical part of computer which we can see and touch ,when software is the set of programmes which have collection of instruction who instruct the computer what to do and how to do.

 

10.                   Write a short note on MICR?

MICR means magnetic ink character reader, which read/scan  the magnetic code of any product/card,  basically used in banking.